6533b85bfe1ef96bd12baa4d

RESEARCH PRODUCT

Mutational analyses of YqjA, a Tvp38/DedA protein of E. coli

Rebecca KellerNicole SchleppiDirk SchneiderJulia Weikum

subject

Protein familyDNA Mutational AnalysisBiophysicsVirulencelac operonmedicine.disease_causeBiochemistryProtein Structure SecondaryTvp38Structural BiologyEscherichia coliGeneticsmedicineOligomerizationFunctionMolecular BiologyEscherichia coliAlanineChemistryEscherichia coli ProteinsCell MembraneMutagenesisMembrane ProteinsGene Expression Regulation BacterialCell BiologyAlanine scanningTransmembrane domainMembrane proteinBiochemistryDedAMembrane proteinMutationProtein Multimerization

description

AbstractMembrane proteins of the DedA/Tvp38 protein family are involved in membrane integrity and virulence of pathogenic organisms. However, the structure and exact function of any member of this large protein family are still unclear. In the present study we analyzed the functional and structural properties of a DedA homolog. Purified YqjA variants from Escherichia coli are detectable in different oligomeric states and specific homo-interaction of YqjA monomers in the membrane were confirmed by formation of a disulfide bond in the C-terminal transmembrane helix. Moreover, alanine scanning mutagenesis exhibited different interaction sites crucial for YqjA activity vs. dimer formation.

yearjournalcountryeditionlanguage
2015-02-26FEBS Letters
https://doi.org/10.1016/j.febslet.2015.02.019